Hello, I didn't have much time to test as I do not know virsh very well. After modifying the Xml files "by hand" and with some working machines as example I was able to create new machines with virsh and to run them through virt-manager. I will try to test creating another new machine and search in the xml file some elements of the problem. Through à diff program I noticed that the CDROM (stated as IDE) was on the same controller as the "sda" disk (stated as XEN disk), the part of the xml is here : <disk type='file' device='disk'> <driver name='qemu' type='raw'/> <source file='/dev/DUO/GALERA_3'/> <target dev='xvda' bus='xen'/> </disk> <disk type='file' device='cdrom'> <target dev='hdb' bus='ide'/> <readonly/> <address type='drive' controller='0' bus='0' target='0' unit='1'/> </disk> <controller type='ide' index='0'/>
After modifying the xml file (I hate XML) I was able to create the machine with virsh, here is the "modified" disk part : <disk type='file' device='disk'> <driver name='qemu' type='raw'/> <source file='/dev/DUO/GALERA_3'/> <target dev='sda' bus='sata'/> <address type='drive' controller='0' bus='0' target='0' unit='0'/> </disk> <controller type='sata' index='0'/> Regards JP P On Sat, Oct 08, 2016 at 07:58:09PM +0200, jpp wrote: Package: virt-manager Version: 1:1.4.0-3 Severity: important Hello, Whe I try to create a new VM it crashes at end just before starting the new machine. The machine is still listed in the panel but can't start. I enclose two backtraces : 1 - at the end of VM creation 2 - when triybg to start the VM And three logfiles : log.2 and log. where created while creating the VM, the last when trying to launch the new machine. A can't help much with xenlight due to lack of a system running it. I'd recommend to reproduce without virt-manager using virsh directly. With a minimal domain XML we might be able to sort this out with the xen maintainers. Looks like there's something wrong with the parameters used for the CDROM. Cheers, -- Guido Hello,

